NISCAIR Online Periodicals Repository Collection: IJC-B Vol.51B(01) [January 2012]

Microwave assisted synthesis and antibacterial properties of some new 2-alkyl/aryl-(6-substitutedcoumarin-3-yl)imidazo[2,1-b][1,3,4]thiadiazoles

Thu, 29 Dec 2011 22:58:59 GMT

Title: Microwave assisted synthesis and antibacterial properties of some new 2-alkyl/aryl-(6-substitutedcoumarin-3-yl)imidazo[2,1-b][1,3,4]thiadiazoles

Authors: Jakhar, Anshu; Makrandi, J K

Abstract: A series of 2-alkyl/aryl-(6-substitutedcoumarin-3-yl)imidazo[2,1-b][1,3,4] thiadiazoles 3a-o have been synthesized by reacting 3-(2-bromoacetyl)-6-substitutedcoumarins 1 with various 5-alkyl/aryl-2-amino-1,3,4-thiadiazoles 2 under normal thermal condition as well as microwave irradiation. The latter condition is found to be much more efficient in terms of time and yield. The structures of the newly synthesized compounds have been characterized by elemental analysis, IR and ¹H NMR spectral data. All the newly synthesized compounds have been tested for their antibacterial properties against gram-positive and gram-negative bacteria.

Page(s): 291-296

Synthesis of some new 3,4-disubstituted pyrroles and pyrazoles from E-1-(arylsulfonylethylsulfonyl)-2-arylethene

Thu, 29 Dec 2011 22:58:59 GMT

Title: Synthesis of some new 3,4-disubstituted pyrroles and pyrazoles from E-1-(arylsulfonylethylsulfonyl)-2-arylethene

Authors: Padmaja, A; Syamaiah, K; Muralikrishna, A; Padmavathi, V

Abstract: The sulfonyl activated olefin, E-1-(arylsulfonylethylsulfonyl)-2-arylethene 7 has been used as a synthon to develop a new class of pyrrole and pyrazole derivatives by 1,3-dipolar cycloaddition of TosMIC and diazomethane.

Page(s): 285-290

Visibility and impact of the Indian Journal of Chemistry, Section B during 2005-2009 using scientometric techniques

Thu, 29 Dec 2011 22:58:59 GMT

Title: Visibility and impact of the Indian Journal of Chemistry, Section B during 2005-2009 using scientometric techniques

Authors: Nishy, P; Parvatharajan, Prema; Prathap, Gangan

Abstract: Organic chemistry has always been one of the strongest areas of research in the chemical sciences in India. The Indian Journal of Chemistry, Section B is the leading journal from India covering important contributions in the area of organic and medicinal chemistry. This is the first attempt to carry out a scientometric assessment of the visibility and impact of this journal towards serving the needs of researchers, mainly from India, in these areas. All papers published in this journal during 2005 to 2009 have been analysed using various scientometric parameters like geographical distribution, citations received each year, authorship patterns, etc. The papers are grouped under four main fields: (i) Heterocyclic Chemistry, (ii) Synthetic Organic Chemistry, (iii) Natural Products Chemistry and (iv) Theoretical Chemistry and assessment and performance of these and the forty five specialized sub-fields in organic chemistry have been studied.

Page(s): 269-284

Mild, efficient and economical oxidative deprotection of allyl aryl ethers

Thu, 29 Dec 2011 22:58:59 GMT

Title: Mild, efficient and economical oxidative deprotection of allyl aryl ethers

Authors: Lokhande, Pradeep D; Nawghare, Beena R

Abstract: An efficient, economical procedure for the cleavage of allyl aryl ethers using a catalytic amount of iodine in dimethyl sulphoxide gives corresponding alcohols or phenols in high yields under mild condition. The reaction can be performed in air without loss of variety of oxidisable fuctional groups. Allyl ether of phenols is selectively deprotected in preference to alcohols. The reaction is highly regioselective and chemoselective.

Page(s): 328-333